update NB4 and NB5

style comment to NB4. update of NB5

Author: mbakker7

notebook4_functions/py_exploratory_comp_4_sol.ipynb

@@ -241,11 +241,18 @@
     "\n",
     "print(testfunc(1))  # Uses default A=1, theta=0: cos(pi)\n",
     "print(testfunc(1, A=2))  # Now A=2, and theta is still 0: 2*cos(pi)\n",
-    "print(testfunc(1, A=2, theta=np.pi / 4))  # Now A=2, theta=pi/4: 2*cos(5pi/4) \n",
+    "print(testfunc(1, A=2, theta=np.pi / 4))  # Now A=2, theta=pi/4: 2*cos(5pi/4)\n",
     "print(testfunc(1, theta=np.pi / 4, A=2))  # Same as above: 2*cos(5pi/4)\n",
     "print(testfunc(1, theta=np.pi / 4))  # Now theta=pi/4, and A is still 1: cos(5pi/4)"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Note that the proper style was applied, as defined in Notebook 1: there are spaces around mathematical symbols, but not around the equal sign of the keyword argument. "
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},